Hello everyone!

I just replaced the timing belt in my daughters 2002 Kia Optima this weekend.
The job went well but there was an odd sound coming from the engine compartment.
I'm thinking it's not from the engine cause it ran pretty good. Test drive went well and it rev's nice. And I'm 99% positive the timing marks were lined up during install. And kept that way through a few turns by hand.

So If it was off how would it sound? I'm guessing I would know for sure.

The upper cover was damaged and not completely covering the belt. The power steering pulley made a nice gouge in it.
I'm guessing thats where the noise was coming from?

Danny

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1984 300SD Turbo Diesel 150,000 miles

OBK member #23

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Probably not pertinent but I had a scare once on the timing belt replacement on my '87 BMW 325i. One replaces the water pump at the same time on these. When it was all back together there was a random clicking of metal on metal sounding noise. I hunted for a good little while and finally discovered that the new water pump was about 1/16th less on the forward projection.

It made the pulley on the water pump strike the pulley below and behind it, running another accessory, in one or two high spots, just a side to side glancing strike, and as the pulleys were different sizes, the knocking was random, depending on when the high spots would line up. I had been worried about the same thing you are, the possibility that I got the belt slightly off.

I ended up epoxying a washer on the inside of the bell shaped water pump pulley at each of the 4 holes, had to glue them to get them in place as there was no way to hold them all while slipping in the bolts. No more noise.

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1986 300SDL, 362K
1984 300D, 138K

On a 4G63 DSM I did a timing belt on, the PS pulley had been rubbing the front cover for a long time. When I put it back together the cover was in a fractionally different place and the pulley was rubbing fresh plastic for a day or two and then the sound went away.

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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i

Is verify all timing marks line up. If they don't then it's time to pull the belt off and re time it and pray you didn't bend anything.

If he bent valves, he'd know.

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68 280SL - 70 280SL - 70 300SEL 3.5 - 72 350SL - 72 280SEL 4.5 - 72 220 - 72 220D - 73 450SL - 84 230GE - 87 200TD - 90 190E 2.0 - 03 G500

Nissan GTR - Nissan Skyline GTS25T - Toyota GTFour - Rover Mini - Toyota Land Cruiser HJ60 - Cadillac Eldorado - BMW E30 - BMW 135i

I doubt it would run. I put mine on one tooth off out of curiosity (non interference engine) and it coughed and sputtered like an engine with holes in 3/4 pistons.

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

This is an interference engine. Depends on how many teeth the belt has to determine how much the valve timing is off if it is.

Should be easy enough to check the refferances for overall timing. Much may depend if the valve timing is off in the forward direction versus the backword or retarded direction.

^ Valuable experiment. I can only imagine that one sacrifices a bit of performance with the non-interference piston style. Years ago I had a Dodge Omni with a 2.2 liter, 5 speed, surprising fast little car. It broke a timing belt with no ill effects. I have a morbid curiosity about what it sounds like to break a belt on an interference car like my Bimmer, maybe someone will accidentally tape the sound some day and post it on Youtube.

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1986 300SDL, 362K
1984 300D, 138K

If the belt one off a tooth and it did run, I think you would find it would run very poorly.

-J

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1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

I love my non-interference. Yeah, it's low compression and blah blah blah but when the timing belt snaps you are greeted with the sweet sweet sound of an engine coasting

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$60 OM617 Blank Exhaust Flanges
$110 OM606 Blank Exhaust Flanges
No merc at the moment

Your sick.

I put a dual overhead cam Honda together with the intake cam off and it would not rev to redline. I think the set up that requires the most thinking is the double VANOS BMW six cylinder engines.

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Jim

It just happened to my friend's VW. 2006 VW 1.8 turbo engine. She said there was a loud clunk and then everything shut off.

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